Texas Instruments claims interference breakthrough

By combining software with its existing chips for 802.11b wireless local area networks (WLANs) and Bluetooth networks, Texas Instruments (TI) claims it has found a way to limit interference between the two wireless technologies in handheld devices.

Bluetooth and 802.11b both send signals across the 2.4GHz frequency, which is also used for a variety of common products like baby monitors or garage door openers. In order to use Bluetooth and 802.11b in the same device effectively, the company needed to develop software for monitoring wireless traffic on a packet level to route high-priority traffic and avoid packet collisions, TI director of advanced WLAN technology, Matthew Shoemake, said.

This co-existence package of chips and software is designed for mobile handsets, smart phones and personal digital assistants. It can also be used in laptop computers, but it was conceived for small, handheld devices more prone to interference problems.

Bluetooth is a short-range wireless technology used primarily for PC peripherals, such as keyboards, or voice connections between a cell phone or smart phone and a wireless headset. The 802.11b standard is used mainly in notebook computers for connections to the Internet or corporate networks.

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